From d76bd1913fe3b9ae7b6d4973f8e0ac57705ce91b Mon Sep 17 00:00:00 2001
From: Jan Schmidt <jan@centricular.com>
Date: Wed, 22 Mar 2017 00:38:51 +1100
Subject: [PATCH] qtdemux: matroskademux: Ignore repeated seek events

Similar to what was done in adaptivedemux, ignore seek
events we've already handled - such as when they are received
on every srcpad of files with lots of streams.
---
 gst/isomp4/qtdemux.c          |  8 ++++++++
 gst/matroska/matroska-demux.c | 11 +++++++++++
 2 files changed, 19 insertions(+)

diff --git a/gst/isomp4/qtdemux.c b/gst/isomp4/qtdemux.c
index ff51d8cabf..8d304bd2bc 100644
--- a/gst/isomp4/qtdemux.c
+++ b/gst/isomp4/qtdemux.c
@@ -1736,6 +1736,14 @@ gst_qtdemux_handle_src_event (GstPad * pad, GstObject * parent,
 #ifndef GST_DISABLE_GST_DEBUG
       GstClockTime ts = gst_util_get_timestamp ();
 #endif
+      guint32 seqnum = gst_event_get_seqnum (event);
+
+      if (seqnum == qtdemux->segment_seqnum) {
+        GST_LOG_OBJECT (pad,
+            "Drop duplicated SEEK event seqnum %" G_GUINT32_FORMAT, seqnum);
+        gst_event_unref (event);
+        return TRUE;
+      }
 
       if (qtdemux->upstream_format_is_time && qtdemux->fragmented) {
         /* seek should be handled by upstream, we might need to re-download fragments */
diff --git a/gst/matroska/matroska-demux.c b/gst/matroska/matroska-demux.c
index 2523367a44..2fe5b3b72f 100644
--- a/gst/matroska/matroska-demux.c
+++ b/gst/matroska/matroska-demux.c
@@ -2368,6 +2368,17 @@ gst_matroska_demux_handle_src_event (GstPad * pad, GstObject * parent,
         gst_event_unref (event);
         return FALSE;
       }
+
+      {
+        guint32 seqnum = gst_event_get_seqnum (event);
+        if (seqnum == demux->segment_seqnum) {
+          GST_LOG_OBJECT (pad,
+              "Drop duplicated SEEK event seqnum %" G_GUINT32_FORMAT, seqnum);
+          gst_event_unref (event);
+          return TRUE;
+        }
+      }
+
       if (!demux->streaming)
         res = gst_matroska_demux_handle_seek_event (demux, pad, event);
       else